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Home >> Lexus >> 2017 >> IS 350 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FSE) - Diagnostic Codes (5 Of 6) >> SFI System >> DTC P1235: High Pressure Fuel Pump Circuit [04/2013 - 10/2017] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever the following DTCs are not stored None
All of the following conditions are met -
Time after engine start 5 seconds or more
Command to injector driver relay On
Output duty cycle More than output duty cycle change map value*, and less than 95%
Battery voltage 10.5 V or higher
Engine switch On (IG)
Starter Off
*: Output duty cycle change map value -
Engine speed is 500 rpm 5%
Engine speed is 2000 rpm 20%
Engine speed is 4000 rpm 40%
Engine speed is 6000 rpm 60%
Engine speed is 8000 rpm 80%